First we subtract it:
18 - 15 = 3
Now we divide it to the original:
3 / 15 = 0.2
Multiply by 100:
0.2 * 100 = 20%
Answer:
A.

Step-by-step explanation:
Given
Ratio = 3:5
Q = -14
S = 2
Required
Which solution uses 
From the given parameters;



Substitute the above values in 
This gives:


<em>From the list of given options, only option A uses the given form of the formula...</em>
Answer:
Degree is 6
Step-by-step explanation:
Solving given polynomial gives -3x^3y^3-2.5xz^2
as this polynomial involves two variables so we'll add the powers on variables in each term
first term: -3x^3y^3, add powers on x and y variables which turns out to be 6
Second term: 2.5xz^2, adding powers on x and z variable results in 3
As degree is the highest power among different powers on terms so here the degree is 6